must clank
Verbo regular: clank - clanked- clanked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must clank
you must clank
he must clank
we must clank
you must clank
they must clank 	I must be clanking
you must be clanking
he must be clanking
we must be clanking
you must be clanking
they must be clanking	I must have clanked
you must have clanked
he must have clanked
we must have clanked
you must have clanked
they must have clanked	I must have been clanking
you must have been clanking
he must have been clanking
we must have been clanking
you must have been clanking
they must have been clanking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't clank
you mustn't clank
he mustn't clank
we mustn't clank
you mustn't clank
they mustn't clank 	I mustn't be clanking
you mustn't be clanking
he mustn't be clanking
we mustn't be clanking
you mustn't be clanking
they mustn't be clanking	I mustn't have clanked
you mustn't have clanked
he mustn't have clanked
we mustn't have clanked
you mustn't have clanked
they mustn't have clanked	I mustn't have been clanking
you mustn't have been clanking
he mustn't have been clanking
we mustn't have been clanking
you mustn't have been clanking
they mustn't have been clanking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I clank?
must you clank?
must he clank?
must we clank?
must you clank?
must they clank? 	must I be clanking?
must you be clanking?
must he be clanking?
must we be clanking?
must you be clanking?
must they be clanking? 	must I have clanked?
must you have clanked?
must he have clanked?
must we have clanked?
must you have clanked?
must they have clanked? 	must I have been clanking?
must you have been clanking?
must he have been clanking?
must we have been clanking?
must you have been clanking?
must they have been clanking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I clank?
mustn't you clank?
mustn't he clank?
mustn't we clank?
mustn't you clank?
mustn't they clank? 	mustn't I be clanking?
mustn't you be clanking?
mustn't he be clanking?
mustn't we be clanking?
mustn't you be clanking?
mustn't they be clanking? 	mustn't I have clanked?
mustn't you have clanked?
mustn't he have clanked?
mustn't we have clanked?
mustn't you have clanked?
mustn't they have clanked? 	mustn't I have been clanking?
mustn't you have been clanking?
mustn't he have been clanking?
mustn't we have been clanking?
mustn't you have been clanking?
mustn't they have been clanking?